inexhaustible

adjectives

that cannot be entirely consumed or used up

"an inexhaustible supply of coal"

inexhaustible, unlimited

incapable of being entirely consumed or used up

"an inexhaustible supply of coal"

inexhaustible

antonym

is similar to

capable of being renewed; replaceable

"renewable energy such as solar energy is theoretically inexhaustible"

is similar to

always able to supply more

"an unfailing source of good stories"; "a subject of unfailing interest"